Jan. 11 (UPI) -- The two flight recorders on board a South Korean airliner stopped working before the jet crashed during an emergency landing and subsequent crash that killed 179 of the 181 people on board, officials said Saturday.

The flight data recorder and cockpit voice recorder, commonly called black boxes, both stopped functioning around four minutes before Jeju Air flight 2216 crashed at Muan International Airport, South Korea's Ministry of Land, Infrastructure and Transport confirmed Saturday in a statement.

The flight recorder of the Jeju Air passenger jet that crashed last month, killing ​179 people, stopped recording for​ its last four minutes, South Korean officials said on Saturday, a significant setback for investigators. Data extracted from the so-called black box, consisting of the ​cockpit voice recorder and the flight data recorder, is generally crucial in investigations of aviation accidents. Officials in South Korea, who have been working with the United States’ National Transportation Safety Board​, have said that the ​flight data for the plane’s last four minutes​ would be...

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